rune factory save error!!

so this is the second this has happened to me now
using the latest firmware (1.11) for the R4, i play rune factory and save and load a few times, then all of a sudden rune factory tells me the data is corrupted and the save game will be deleted (when trying to load). anybody have any clue why? any fixes on this?

It's not worth the trouble of getting far in the game to risk losing data. You'll wind up investing a lot into this game just to make progress. I can't imagine what I'd do if I lost everything I've done so far. Too many upgrades and such.

R4 is good for testing, but after you know you like it, it's safer to own the retail.

well its happened to me twice already... first time during summer 10-20 hours maybe, then second time just last night at day 8 of spring.. was weird.. just got into the second cave died then file was corrupted, i did leave my ds on most of the day just in "pause" mode when you close the ds, so i'm not sure if it's # of save/loads or total time played or just the way the game saves... but i'm doing backups after each day and we'll see what happens